Impending HRT wave precursors to the Wenchuan M_s8.0 earthquake and methods of earthquake impending

来源 :Science in China(Series D:Earth Sciences) | 被引量 : 0次 | 上传用户:fang82888
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
We deployed four geo-electric monitoring stations in Sichuan and Yunnan provinces from 2004, using the new generation of equipment (PS-100) and technologies to capture the HRT wave earthquake precursor. Before the Wenchuan Ms8.0 earthquake, we recorded the HRT wave precursor at the only operating station in Hongge (HG, Δ=465 km) and found that significant impending signal had been recorded at the station in the early morning ( 0―5 am) of 12th of May, 2008. The precursor for this earthquake is consistent with precursors recorded for other strong earthquakes. The measured physical properties (geo-resistivity and telluric-current) show tidal wave period oscillations from several days to several months before the earthquakes and the amplitude of such HT oscillation increases significantly towards the occurrence of an earthquake. These HT and RT waves from the epicenter have a causal relationship with the earthquakes that happened several days later. The arrival time of two RT waves is proportional to the distance from the station to the epicenter. The estimated natural decay of the amplitude is correlated with the natural period (T0) of the earthquake fault, which is proportional to the fault length. From this relationship, we can predict the earthquake magnitude. For magnitude 6―9 earthquakes, the natural period is about 1―6 hours. Such oscillation comes from the epicenter area and they can propagate several thousand kilometers in the Earth’s crust. Before a strong earthquake in the shallow crust, the conductive pore fluid will experience major changes before the fault rapture. Such fluid change will emit an oscillation in the pore fluid pressure. This is the mechanism for the HRT wave generation. Since the China Earthquake Administration funded the HRT wave short-term earth-quake prediction project in 2003, the first record of HRT precursor wave has been recorded from the 2004-12-26 Sumatra Mw9.0 earthquake with the largest epicentre distance Δ=2900 km. Thereafter, we have captured HRT waves from more than twenty strong earthquakes, which are well-matched and show repeatability, consistency and regularity. All our observation with the HRT waves demonstrate that HRT wave precursors to earthquakes indeed exist. Strong earthquakes can be predicted and short-term and impending earthquake prediction is achievable in the very near future. From all the observations, including the ones at HG station from Wenchuan Ms8.0 earthquake, we conclude that using HRT wave to predict earthquakes is feasible. We deployed four geo-electric monitoring stations in Sichuan and Yunnan provinces from 2004, using the new generation of equipment (PS-100) and technologies to capture the HRT wave earthquake precursor. Before the Wenchuan Ms8.0 earthquake, we recorded the HRT wave precursor at the only operating station in Hongge (HG, Δ = 465 km) and found that significant impending signal had been recorded at the station in the early morning (0-5 am) of 12th of May, 2008. The precursor for this earthquake is consistent with precursors recorded for other strong earthquakes. The measured physical properties (geo-resistivity and telluric-current) show tidal wave period oscillations from several days to several months before the earthquakes and the amplitude of such HT oscillations significantly toward the occurrence of an earthquake. These HT and RT waves from the epicenter have a causal relationship with the earthquakes that happened several days later. The arrival time of two RT waves is p The estimated natural decay of the amplitude is correlated with the natural period (T0) of the earthquake fault, which is proportional to the fault length. From this relationship, we can predict the earthquake magnitude Such oscillation comes from the epicenter area and they can propagate several thousand kilometers in the Earth’s crust. Before a strong earthquake in the shallow crust, the conductive pore fluid will experience major changes before the fault rapture. Such fluid change will emit an oscillation in the pore fluid pressure. This is the mechanism for the HRT wave generation. Since the China Earthquake Administration funded the HRT wave short-term earth-quake prediction project in 2003, the first record of HRT precursor wave has been recorded from the 2004-12-26 Sumatra Mw 9.0 earthquake with the largest epicentral distance Δ = 2900 km. Therea fter, wehave captured HRT waves from more than twenty strong earthquakes, which are well-matched and show repeatability, consistency and regularity. All our observation with the HRT waves demonstrate that HRT wave precursors to earthquakes indeed exist. Strong earthquakes can be predicted and short-term From all the observations, including the ones at HG station from Wenchuan Ms8.0 earthquake, we conclude that using HRT wave to predict earthquakes is feasible.
其他文献
Progression of hepatocellular carcinoma (HCC) is a stepwise process that proceeds from preneoplastic lesions-including low-grade dysplastic nodules (LGDNs) and
职业教育的发展对新形势下新疆的社会稳定与长治久安有着不可估量的作用。本文针对吐鲁番地区职业教育发展现状和客观需求,在共生视域下探索如何借助湖南职业教育的优势资源,
班主任作为班级的管理者,肩负着引导和教育学生的重要职责,在组织与开展班级工作的过程中,班主任往往需要通过一定的原则与技巧来提高班级管理的效果,而交流是其中最为重要的
本文以Nattinger和DiCarrico提出的词块理论为框架,分析了在大学英语口语教学过程中,该理论对口语表达准确度以及流利度的促进作用。 Based on the block theory proposed b
石油类高职院校的就业管理对于大学生的就业具有很重要的意义,同时也是高职院校教育管理的重要部分。但是由于我国石油类高职院校体制进行不断的改革,在就业管理上逐渐地出现
泥河湾盆地东部地处半干旱地区,地下水资源分布不均,水质优劣不一。根据含水介质的不同该区地下水可以划分出松散岩类孔隙水含水岩组和基岩裂隙类含水岩组两大类,并依据地层
高等学校实行党委领导下的校长负责制,因此,在高校也就形成了党委和行政两套班子,两套班子之间,班子成员相互之间能否形成合力,最终体现的也是学校的一种核心竞争力。而班子
在外语学习中情感因素起着很重要的作用。本文通过介绍情感因素理论,探讨影响外语学习的动机、自信和焦虑等因素。 Emotional factors play a very important role in forei
根据东海陆架Zk23孔岩心分析资料,进行了沉积地层学、生物地层学和年代地层学分析,确定了该钻孔中段细砂层为埋藏古长江河口沙脊沉积,阐明了该孔附近海区冰消期前后和冰后期
语言测试跟语言教学有着千丝万缕的联系,教学质量的提高,教学方法的改进会提高测试成绩,测试的反馈信息可用于评估教学效果,对提高教学质量有积极的推动作用。笔者通过分析考